Which coding system is used to report procedures and services on inpatient hospital claims?

The coding system used to report procedures and services on inpatient hospital claims is the International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM) for diagnoses and the Current Procedural Terminology (CPT) or the Healthcare Common Procedure Coding System (HCPCS) for procedures and services. ICD-10-CM codes provide detailed information about patient diagnoses, while CPT and HCPCS codes are used for reporting medical services and procedures. Together, these coding systems facilitate billing and ensure accurate reimbursement for healthcare services provided in inpatient settings.